senior correspondent john my ser a former fbi assistant director. he's here. and we came back from this interview -- i told you what he said and you thought it was pretty interesting. >> i thought it was a surprise. and as world leaders gather around new york for the u.n. general assembly, their motorcades are bound to pass one of the many billboards asking for their help in locating robert levinson, but the intended audience for that ad campaign may be just one man, iran's president mahmood ahmadinejad. and as we learned, he may have the answers to a mystery that has consumed levinson's family for more than five years. >> reporter: is it one of those things that you get used to? >> oh, never. >> reporter: as i walked through times square with christine levinson and her son dan, neither were prepared for what they were about to see. there was robert levinson staring back at his wife and ston frson from an electronic billboard. the picture was taken from a mysterious video that the family received nearly two years ago. levinson, a retired fbi agent, pale and ga